Question

What is the value of the expression below when w equals
8?
W^2- 4w - 2

Answer 1

When w =8. then...

8^2-4(8)-2.

64-32-2=30.

Answer 2

Explanation:

Plug in the value of w in the expression and use PEMDAS

w² - 4w - 2 = 8² - 4*8 - 2 {Need to calculate exponents}

= 64 - 4*8 - 2 {Now do multiplication}

= 64 - 32 - 2

= 32 - 2

= 30